What do A pos and C pos mean?
The # column is the rank of each listed entry for Helmut Sigel — rank 1 means this entry is where Helmut Sigel has the most articles or citations. A pos and C pos show the reciprocal: the position of Helmut Sigel within that entry's own ranked list, by articles and citations respectively. A low value means Helmut Sigel is among the most prominent contributors for that entry.
